Pump cleaning Cleaning CIP CIP plant cleaning CIP compatible ...

The t ransf er of hygienic, high quality product s requires a clean pump. Theref ore at t he end
of a production process the pumps must be cleaned immediately. The plant needs to be
clean and free from germs before starting a new production cycle.
Cleaning is the operation to remove all traces of product from the plant. A properly cleaned
surface is free from visible, perceptible or chemically detectable dirt deposits (residue).
The standard cleaning process for plants is the CIP - (Cleaning in Place). This implies cleaning
without dismantling of the plant by means of CIP fluids.
In the food industry a CIP process requires the following steps:
• preliminary rinsing with water
• flushing with alkaline solution
• intermediate rinsing with water
• flushing with acid
• rinsing with clean water
To clean the unit efficiently a turbulent flow of the CIP fluid is required. A minimum flow
velocity in pipes is usually 2 m/s.
Viscous fluids are often transferred by positive displacement pumps at low flow velocities. In
order to obtain the flow rate required for CIP it may be necessary to fit an additional cleaning
pump such as a centrifugal pump.
Frist am pumps are fully CIP capable. They are characterised by:
• welded and ground joints
• round edges and angles
• smooth joining
• no narrow gaps and dead legs
• O-rings immersed in the pump housing
• smooth, nonporous internals with a high surface finish
Pump cleaning
Cleaning
CIP
CIP plant cleaning
CIP compatible design

Pump cleaning
SIP
After CIP cleaning an additional sterilisation in place process (SIP) may be required when
highly sensitive products are handled, inactivating any micro- organisms which might be still
present in t he pump.
The sterilisation can be carried out by means of chemicals, hot water or steam. In the dairy
industry the sterilisation temperature is approximately 145° C.